<?php
$form = $this->form;
$form->setAttribute('action', $this->url(
'authenticate',
array(
'action'     => 'facebook',
'controller' => 'Authenticate'
)
));
$form->prepare();

echo $this->form()->openTag($form);
echo $this->formCollection($form);
echo $this->form()->closeTag();
?>
<!--
<form action="/authenticate/facebook" method="POST" name="Integer" id="Integer">
    <label>
        <span>Username:</span>
        <input name="username" type="text" value="">
    </label>
    <label>
        <span>Your email address:</span>
        <input type="email" name="email" value="">
    </label>
</form>
-->